2" Oval Gray Gum Ply Wrapped Inserts 1/4" x 5/16" Diameter Box of 20

2" Oval Gray Gum Ply Wrapped Inserts 1/4" x 5/16" Diameter 31inc 12-206 / BOWES TR 37491 Box of 20. These poly wrapped inserts are available in two lengths: 2” (50mm) for passenger and 8” (230mm) for truck applications. These vulcanizing inserts are designed to “fill the injury” and may be used in radial or bias-ply tires. Poly wrapped inserts will vulcanize chemically or in a heat curing system. Use any side load insert needle for easy installation.